Lets pretend your an Ethical Hacker, or Network Security Analyst. Linux/Unix allows you to write extremely fast bash scripts for doing automated tasks that might take an entire day to write in C (Though bash and python combined are more effective then either bash, python, or C alone (provided it's for a quick script. For a full-blown program, use C)), and it offers a broad range of tools from port scanners to firewall mappers to remote shell tools.
Bash is available on platforms other than Linux, including but not limited to OS X and Windows. So is Python.
I don't see your point. Real ethical hackers/security experts write their own tools.
Originally Posted by Flareboy323
Though, if you're looking for "31337 H4X0R1NG T00LZ" like you said, you'll probably find the person using a Windows OS because it has all those sooper cool hax0r tools from HackForums like blind SQL injectors and stuff. If you were serious about website security, and say you did web application security for a job, you wouldn't be using those tools - you would be using something like Havij, which, coincidentally, is available under *nix as well as windows. This, I believe, is why *nix operating systems are more used by computer security analysts. Though, if you see a leet hax0r using it, he probably either dual boots with windows, has a windows virtual machine, or uses ubuntu and doesn't know how to do anything on the sh terminal or anything else.